Rackspace Hosting Inc. Chairman Graham Weston is listed on Forbes.com as having a $1.25 billion net worth “as of March 2013,” but he was not on the world billionaires list posted Monday by the magazine. A Forbes editor, in an email, said he belongs on the list, but rankings were not immediately available.

Rackspace Hosting Inc. Chairman Graham Weston is listed on Forbes.com as having a $1.25 billion net worth “as of March 2013,” but he was not on the world billionaires list posted Monday by the magazine. A

1,175. NFL team owner Tom Benson, 85, has a net worth of $1.2 billion. A year ago, Forbes listed Benson at No. 1,075 with a net worth of $1.1 billion. Benson is listed by Forbes as a New Orleans resident, but he also has a San Antonio home and local banking interests. Benson owns the New Orleans Saints.

1,175. NFL team owner Tom Benson, 85, has a net worth of $1.2 billion. A year ago, Forbes listed Benson at No. 1,075 with a net worth of $1.1 billion. Benson is listed by Forbes as a New Orleans resident, but

1,268. Kinetic Concepts Inc. founder James Leininger, 67, has a net worth of $1.1 billion, the same net worth as a year ago when he had a ranking of No. 1,075.

1,268. Kinetic Concepts Inc. founder James Leininger, 67, has a net worth of $1.1 billion, the same net worth as a year ago when he had a ranking of No. 1,075.

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Early Monday, it looked like Graham Weston, co-founder and chairman of Rackspace Hosting Inc., again had been locked out of the billionaires club.

Forbes magazine posted its latest list of the world's billionaires online Monday, which included six San Antonians. Weston, who celebrated his birthday Monday, wasn't one of them.

Until he was.

A search for “Graham Weston” on the Forbes.com site produced a page that pegged Weston's net worth at $1.25 billion, but he was not on the magazine's world billionaire list.

An email seeking clarification about Weston's billionaire status brought a response from a Forbes staffer. “Honestly almost had a heart attack, but he is most certainly in the ranks,” Forbes staffer Luisa Kroll wrote. By the afternoon, Weston had a ranking assigned to him — 1,161 — and was added to the list.

He did not immediately respond to an interview request late Monday afternoon.

The official list, presumably with Weston, will be published in the magazine's March 25 print edition.

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Nearly a year ago, the 49-year-old — most of whose wealth is tied up in Rackspace stock — apparently was kept off the prestigious list by a one-day change in the share price of the cloud computing and hosting company.

But Weston earned a place on Forbes' list of the 400 richest Americans — at No. 360 — that the magazine released in September.

San Antonio's other six billionaires on this year's billionaires list, the one released Monday, have appeared previously in the rankings.

H-E-B Chairman and CEO Charles Butt, 75, remains the richest San Antonian, listed at No. 157 in the world with a net worth of $7.4 billion. A year ago, Forbes had listed Butt at 153, with a net worth of $6.4 billion.

Natural gas driller Rodney Lewis, 59, is listed at No. 554, with a net worth of $2.6 billion, down from $2.8 billion a year ago, when he was ranked No. 418.

Silver Ventures owner Christopher “Kit” Goldsbury, 70, is ranked No. 1,088 with a net worth of $1.35 billion, up from a net worth a year ago of $1.3 billion. Goldsbury was ranked at No. 960 a year ago.

Investor B.J. “Red” McCombs, 85, is ranked No. 1,107, with a net worth of $1.3 billion, down from $1.4 billion and a ranking of No. 913.

Tom Benson, 85, owner of the NFL's New Orleans Saints, is ranked No. 1,175 with a net worth of $1.2 billion. A year ago, Forbes ranked Benson at No. 1,075, with a net worth of $1.1 billion. Benson is listed by Forbes as a New Orleans resident, but he also has a San Antonio home and local banking interests.

Mexico's Carlos Slim Helú retains the title as the world's richest, with a net worth of $73 billion, up from $69 billion a year ago. Slim holds a $6 billion lead over No. 2 Bill Gates, Microsoft Corp. co-founder, with a new worth of $67 billion, up from $61 billion a year ago.

At No. 3 is Spanish retailer Amancio Ortega, with a net worth of $57 billion.

The ranks of the world's billionaires reached all-time highs, the magazine said, both in the number of billionaires — 1,427, counting Weston — and their net worth — a combined $5.4 trillion.